National standard gate valve
I. Overview:
The high and medium pressure flanged gate valves are suitable for pipelines of various systems in petroleum, chemical industry, water conservancy, and thermal power plants where the nominal pressure is PN1.6～16.0MPa and the working temperature is ≤-29℃～550℃, to cut off or connect the pipeline medium. The applicable media include: water, oil products, steam, acid, alkali, ammonia, urea, etc.
The opening and closing part is a gate, whose moving direction is perpendicular to the fluid direction. The gate valve can only be fully opened or fully closed, and cannot be used for regulation or throttling. The gate has two sealing surfaces; the two sealing surfaces of the most common wedge gate valves form a wedge shape, and the wedge angle varies with valve parameters. The gate of a wedge gate valve can be made as a whole, called a rigid gate; it can also be made as a gate that can produce slight deformation, to improve its process performance and compensate for the deviation of the sealing surface angle generated during processing. This type of gate is called an elastic gate. This type of valve should generally be installed horizontally in the pipeline.
II. Structural Features
1. Exquisite material selection, in line with relevant domestic and international standards, with high material quality.
2. Meeting the requirements of domestic and international standards, with reliable sealing, excellent performance, and beautiful appearance.
3. The sealing pair is reasonably matched. The sealing surfaces of the gate and valve seat are surfaced with Stellite cobalt-based hard alloys of different hardness, ensuring reliable sealing, high hardness, wear resistance, high temperature resistance, corrosion resistance, good scratch resistance, and long service life.
4. The valve stem is subjected to quenching and tempering and surface nitriding treatment, providing good corrosion resistance, scratch resistance, and wear resistance.
5. Adopting a wedge-type elastic gate structure, with thrust bearings for medium and large diameters, resulting in small friction. It is equipped with an impact handwheel, making opening and closing easy and flexible.
6. Various piping flange standards and flange sealing surface forms can be adopted to meet various engineering and user requirements.
Performance Parameters
Working Temperature | Normal Temperature | Pressure Environment | Low Pressure |
Application | Throttling | Driving Mode | Manual |
Flow Direction | Unidirectional | Appearance | Medium-sized |
Type | Straight-through Type | Standard | GB |
Sealing Form | Hard Sealing Type | Material | Carbon Steel |
Applicable Temperature | 425 (℃) | Pressure Range | 1.6 (Mpa) |
Applicable Medium | Water, Steam, Oil | Nominal Diameter | DN50 (mm) |
Main Body Material | Carbon Steel | Connection Form | Flange |
Alias | Z41H-16C National Standard Gate Valve | Applicable Scope | Applied in various fields such as national defense, scientific research, aerospace, electronics, machinery, metallurgy, petroleum, chemical industry, energy, environmental protection, biology, refrigeration, and food. |
| Machinery & Equipment/Valves/Gate Valves | |
